A method is provided for marking a location on a surface of a component. The location defines a normal extending perpendicularly therefrom. The method includes irradiating the location with a first laser beam to create a first mark having a first color. The first laser beam is disposed at a first angle relative to the normal. The method also includes irradiating the location with a second laser beam to create a second mark having a second color different than the first color. The second laser beam is disposed at a second angle relative to the normal. The second angle is different than the first angle.

A method is provided for marking a location on a surface of a component. The location defines a normal extending perpendicularly therefrom. The method includes irradiating the location with a first laser beam to create a first mark having a first color. The first laser beam is disposed at a first angle relative to the normal. The method also includes irradiating the location with a second laser beam to create a second mark having a second color different than the first color. The second laser beam is disposed at a second angle relative to the normal. The second angle is different than the first angle.

The invention relates to a method for transferring colored markings or labels onto plastic surfaces by means of a laser beam, to a transfer medium for carrying out said method and to articles, the plastic surfaces of which are laser-marked or laser-labeled by way of such a method.

A material of formula (I)
M.sup.1.sub.aM.sup.2.sub.bW.sub.cO.sub.d(P(O).sub.nR.sub.m).sub.e  (I)
wherein each of M.sup.1 and M.sup.2 is independently ammonium or a metal cation; a is 0.01 to 0.5; b is 0 to 0.5; c is 1; d is 2.5 to 3; e is 0.01 to 0.75; n is 1, 2 or 3; m is 1, 2 or 3; and R is an optionally substituted hydrocarbyl group.

A method for marking a workpiece (6) uses a device, wherein the workpiece (6) is formed at least partially in a thermal master or forming process, comprises a surface (10) directed towards the workpiece (6), wherein a number of individually controllable heating elements (2) is distributed behind the surface (10) for a local heating of a workpiece surface portion. Each of the heating elements (2) comprises a solid material (11) having a surface structure and a heating structure (3), wherein the surface (10) directed towards the workpiece (6) encompassing the surface structures (40) has a uniform smooth surface allowing to dark, burn or foam the surface (7) of the workpiece (6) through heat introduction.

Examples described herein relate to a system consistent with the disclosure. For instance, the system may comprise a printing device including hardware to form an image on a print medium, a memory resource, and a controller to receive a print job to form the markings on the print medium, designate a pixel of the received print job to form a covert dot pattern on the markings, where the pixel corresponds to a first laser intensity level; and adjust a laser intensity of the printing device to a second laser intensity level based on the first laser intensity level of the designated pixel to form the covert dot pattern.

A barcoded end facet printed photonic chip includes: an optically transparent direct laser writing substrate including a transverse waveguide writing surface to receive a direct write laser light for off-axis direct write laser printing and a facet surface to receive the direct write laser light for on-axis direct write laser printing of a barcode-guided direct laser written optical coupling on the facet surface; a waveguide disposed in the optically transparent direct laser writing substrate and in optical communication with the facet surface; and an optically visible bulk impregnated barcode disposed in the optically transparent direct laser writing substrate arranged proximate to the waveguide and in optical communication with the facet surface.

Systems and methods for printing data on a substrate including a color-changeable material are provided. One system includes a processing circuit and a device including an energy source. At least a portion of a printed publication is printed on the substrate using a commercial printing press based on fixed data. The device including the energy source is configured to add variable data to the substrate. The processing circuit is configured to receive the variable data and to control the energy source to change a color of the color-changeable material based on the variable data to provide at least a portion of the printed publication. The processing circuit is configured to control the energy source to change the color of the color-changeable material in-line with a flow of the substrate through one of a printing line, a finishing line, or a packaging line of the commercial printing press.

Systems and methods for printing data on a substrate including a color-changeable material are provided. One system includes a processing circuit and a device including an energy source. At least a portion of a printed publication is printed on the substrate using a commercial printing press based on fixed data. The device including the energy source is configured to add variable data to the substrate. The processing circuit is configured to receive the variable data and to control the energy source to change a color of the color-changeable material based on the variable data to provide at least a portion of the printed publication. The processing circuit is configured to control the energy source to change the color of the color-changeable material in-line with a flow of the substrate through one of a printing line, a finishing line, or a packaging line of the commercial printing press.

Described herein a heat transfer label comprising a support portion comprising a release layer having a first side and a second side and a first carrier at least partially disposed on the first side of the release layer; and a transfer portion comprising a engravable first ink layer having a first side and a second side; and an adhesive layer having a first side and a second side, wherein a graphic design is engraved on the first ink layer using the laser light after the heat transfer label is at least partially bonded onto a substrate. Also described herein are methods of laser engraving a heat transfer label comprising at least partially bonding the heat transfer label described herein onto a substrate; and at least partially laser engraving the ink layer.